Software And Internet Blog





September 12, 2009

How to resolve “bad super block: magic number wrong” in BSD

Filed under: Internet Technology

Sometimes, after upgrading your BSD (Berkeley Software Distribution) operating system, your computer system booting process halts showing you an error message. Few main reasons for the booting error message can be file system corruption, superblock damage, inode corruption, and more. After the above error message appears, the data stored in your hard drive becomes inaccessible. To access your data after a booting error message appears, you will need to restore it from an updated backup. But if in case, you have not created any backup or the backup file(s) are unable to restore the required data, then you will need to use advanced BSD Data Recovery application, which can recover your lost data.

Consider a practical scenario, where you successfully upgrade your system to Free BSD 4.7. However, after the upgradation is complete and you restart your system, your system becomes unbootable and the below error message appears:

“bad super block: magic number wrong”

Once the above error message appears, the data stored in your hard drive becomes inaccessible. Furthermore, the same error message appears each time you attempt to boot your system.

Cause:

The root cause for the occurrence of the above error message is the corruption or damage of superblock.

Resolution:

For complete resolution of the above error message and access your hard drive data, you will need to run fsck command. The command is primarily used to repair all the file corruption issues. In most situations, the above error message is resolved by using the fsck command. But, if the error message reappears, then you will need to use alternative superblock.

However, if both the resolutions fail to perform and your hard drive data remains inaccessible, then you will need to use advanced BSD Data Recovery software to recover your lost data. Such BSD Recovery tools are designed by highly talented data recovery experts and are built with highly interactive user interface, which makes them self explanatory without any prior BSD Data Recovery experience. These applications use powerful scanning procedures to completely scan and recover the lost data from hard drive.

Stellar Phoenix BSD Data Recovery software is a power packed BSD Recovery software. The read only tool is applicable for UFS1 and UFS2 file systems and for all the three BSD distributions viz. FreeBSD, NetBSD, and OpenBSD. The software is designed for Windows 2003, XP, 2000, NT, ME, 98, and 95.

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Xbox 360 - Fun Gaming Packed In A Box

Developed in November 2005, the Xbox 360 gaming console is Microsoft`s solid answer to Sony`s play station. Having already sold 20 million units worldwide, it is still proving to be popular among gaming freaks. Designed by the Hers Experimental Design Laboratory Inc. of Japan and Astro Studios of USA, the Xbox 360 is a fine product of its kind. It is available in two different types.

One is the Xbox 360 and the other is the core system. The Xbox 360 pack houses an Ethernet connectivity cable, a headset, a HD AV cable, a media remote, removable hard drive and a wireless controller whereas the core system has an AV cable and a wired controller. Being the powerful machine that it is, it has all the capacities to compete with other major brand of gaming consoles.

The Xbox 360 gaming console is a great improvisation over the original Xbox built in 2001. As mentioned above, for people who really want to own an Xbox 360, to have a chance to choose from its available models according to their budget, it is a good option. There is a basic core version available which comes with wired controller and composite AV cable but you surely can move on to buy the other peripherals, as and when your budget allows. But, if you are someone who can afford to buy the whole system at once, then you can be advised to go for the Xbox 360 pack. The Xbox 360 gaming console allows up to four wireless controllers to function on one console. This can provide the user with a real thrill of gaming with three other players concurrently.

The uses of the Xbox 360 gaming console are multiple in nature. It can introduce you to a fine world of digital entertainment. Armed with the capacity of enhancing your music and movies, it can magnify its sound to soft or loud. If you attach it to your TV, you can take the advantage of its high definition TV resolution to the maximum. Games that can be absolutely relished on the Xbox 360 are: `Dead or Alive 4`, `King Kong`, `Call of Duty 2` and `Need for speed Most Wanted`. These games are really considered as must haves for those who own the gaming console.

However, there is one minor disappointment in store for Xbox fans. Some games like `Madden NFL 06` and `NBA Live 06`, which run exceedingly well in the original Xbox, do not run that amazingly in the Xbox 360 version. The audio and video effects are not up to the mark when these games are played on the latest model. Microsoft needs to pay immediate attention to this concern, which might become a potential reason of a deal breaker in future days.

Another very alluring advantage that the Xbox 360 gaming console has to offer is the `family settings` feature. This feature has become a favorite among parents who can now protect their children from unpleasant contacts. This control feature performs two functions in the gaming console. They are allow/restrict access to offline games/movies and access to online contact and content. All said and done, the Xbox 360 has everything in it to become a favorite of gaming freaks across age groups.

You can have access to articles about video games in portuguese language from page Video_Games

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April 27, 2009

Surviving Conficker Worm

Conflicker did not unleash a global attack like SQL Slammer- a worm that crippled the Internet in 30 minutes. But, it isn’t because it wasn’t capable per se.

The fact is that crippling the Internet is not a smart business model. It is like showing your hand in poker. Right now there are somewhere between 3 million and 15 million computers compromised by Conficker. Both numbers are big, but the larger point is the range in the estimates. Give or take 12 million PC’s, nobody really knows how big the threat is. There are 12 million PC’s that might be infected, or maybe not.

To unleash the global Conficker army in some sort of massive April Fool’s Day prank that grinds the Internet to a halt just for the sake of doing so might have entertainment value, but it doesn’t generate revenue. What it would do is to help identify the compromised machines, enabling them to be cleaned and patched, and help wipe out the threat. The Conficker creators have a business interest in flying under the radar so they can live to fight- and profit- another day.

So- nothing really happened on April 1st. Does that mean that we can just forget Conficker ever existed and move on? Absolutely not. The fact that nothing visible occurred from Conficker on April 1st means that there are still millions of PC’s- somewhere between 3 million and 15 million- compromised with Conficker. They can send out spam. They can host malware. They can be used in a botnet denial-of-service attack. They are a mercenary army of malicious PC’s for hire.
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April 21, 2009

Software Review - Autodesk Maya 2009

Maya celebrates its tenth anniversary with the 2009 release, an event marked by enhancements across the board. Although some of these have popped up in other Autodesk tools before now.
For example, Maya’s modelling toolset gains true Soft Selection (below), a technique found in 3DS Max and Mudbox that allows you to sculpt smoothly by manipulating weighted selections of a mesh. Once the selection is created with the mouse (Select, Move, Rotate or Scale tool) and keyboard shortcuts (B), it can be moved, scaled and rotated.

Colour feedback indicates the size of the area affected and a much smoother transformation than normal is possible. The fall-off area of the effect (the strength and coverage of the selection’s influence) can be increased or decreased by holding B and the left and right mouse button, while the shape can be modified through the use of the Falloff curve.

It’s also possible to set the fall-off to affect multiple objects at the same time (setting it to have a global basis) such as deforming a row of teeth to match a jawline. By pressing ‘ on the keyboard and simultaneously dragging a component, you can also invoke a Tweak mode allowing you to quickly move components under the mouse regardless of whether you are currently using the Select tool, Move tool, Rotate tool or Scale tool. Soft selection also works well when used with symmetrical modelling – another key feature of Mudbox.
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April 14, 2009

Understanding SSL and TLS

Filed under: Internet Technology

Transport Layer Security (TLS) is a protocol that enables authentication and data encryption over insecure networks. It is implemented as a layer between TCP/IP and higher-level network protocols like HTTP, SMTP, and NNTP. The implementation of SSL in web browsers is nearly seamless for users, providing cryptographic authentication and session-based encryption at a minimal cost in ease of use.

This article describes TLS and its close cousin, Secure Sockets Layer (SSL). You’ll learn how MIDP (the Mobile Information Device Profile) 1.0 and MIDP 2.0 support TLS and SSL, code some examples, and get an understanding of the security level of TLS and SSL.

Overview of TLS

The TLS protocol is an updated version of the SSLv3 protocol, originally created by Netscape. The two protocols are closely related, although not directly interoperable.

One of the strengths of TLS is that it operates directly on top of TCP/IP sockets, and they behave very much like TCP/IP sockets as far as higher-level protocols are concerned. As a result it’s relatively easy to make network applications use an TLS socket instead of a plain vanilla socket. One common example is an application using HTTPS, which is the HTTP protocol running on a TLS or SSL socket.
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April 9, 2009

Cisco Security Advisory - SSL/TLS Certificate and SSH Public Key Validation Vulnerability

Summary

The Cisco Security Monitoring, Analysis and Response System (CS-MARS) and the Cisco Adaptive Security Device Manager (ASDM) do not validate the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) certificates or Secure Shell (SSH) public keys presented by devices they are configured to connect to. Malicious users may be able to use this lack of certificate or public key validation to impersonate the devices that these affected products connect to, which could then be used to obtain sensitive information or misreport information.

Cisco has made free software available to address this vulnerability for affected customers.

This advisory is posted at Summary The Cisco Security Monitoring, Analysis and Response System (CS-MARS) and the Cisco Adaptive Security Device Manager (ASDM) do not validate the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) certificates or Secure Shell (SSH) public keys presented by devices they are configured to connect to. Malicious users may be able to use this lack of certificate or public key validation to impersonate the devices that these affected products connect to, which could then be used to obtain sensitive information or misreport information. Cisco has made free software available to address this vulnerability for affected customers. This advisory is posted http://www.cisco.com/warp/public/707/cisco-sa-20070118-certs.shtml.

Affected Products

The following products are affected by the vulnerability described in this document:

* Cisco Security Monitoring, Analysis and Response System (CS-MARS)

All CS-MARS versions prior to 4.2.3 are affected.

To verify the version of CS-MARS software, log into CS-MARS web interface using a web browser and go to the “Help” tab located on the top-right corner of the browser window. Then click on the “About” link. The CS-MARS version will be displayed in the center of the browser window under “CS-MARS Information”.
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